/*
 * Copyright 2007-2009 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.paoding.rose.web.impl.validation;

import net.paoding.rose.Rc;
import net.paoding.rose.web.impl.thread.InvocationBean;

import org.springframework.util.StringUtils;
import org.springframework.validation.AbstractBindingResult;
import org.springframework.validation.FieldError;

/**
 * 控制器action方法普通参数绑定信息类，
 * 
 * @author qieqie.wang@paoding.net
 * 
 */
public class ParameterBindingResult extends AbstractBindingResult {

	public static final String OBJECT_NAME = "parameterBindingResult";

	private static final long serialVersionUID = -592629554361073051L;

	private InvocationBean invocation;

	public ParameterBindingResult(InvocationBean invocation) {
		super(OBJECT_NAME);
		this.invocation = invocation;
	}

	@Override
	public Object getTarget() {
		return this.invocation;
	}

	public void rejectValue(String field, String errorCode, Object[] errorArgs,
			String defaultMessage) {
		if ("".equals(getNestedPath()) && !StringUtils.hasLength(field)) {
			// We're at the top of the nested object hierarchy,
			// so the present level is not a field but rather the top object.
			// The best we can do is register a global error here...
			reject(errorCode, errorArgs, defaultMessage);
			return;
		}
		String fixedField = fixedField(field);
		Object newVal = getActualFieldValue(fixedField);
		FieldError fe = new FieldError(getObjectName(), fixedField, newVal, true,
				resolveMessageCodes(errorCode, field), errorArgs, defaultMessage);
		addError(fe);
	}

	@Override
	protected Object getActualFieldValue(String field) {
		Object value = invocation.getActionMatchResult().getParameter(field);
		if (value == null) {
			value = Rc.request().getAttribute(field);
		}
		return value;
	}

}
